Eurasian’s extreme letters: anger mounting (5)
I believe the answer is:
azeri
'eurasian's' is the definition.
I don't know anything about this answer so I can't tell whether it can be defined by this definition.
'extreme letters anger mounting' is the wordplay.
'extreme letters' becomes 'AZ' (first and last letters of the alphabet).
'anger' becomes 'ire' (ire is intense rage).
'mounting' says the letters should be written backwards (going up in a down clue).
'ire' written backwards gives 'eri'.
'az'+'eri'='AZERI'
Can you help me to learn more?
(Other definitions for azeri that I've seen before include "foreign language" , "National" , "Ethnic group living in Azerbaijan" , "Countryman" , "Caucasian" .)